From patchwork Mon Aug 7 16:39:20 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 9885803 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B8537603F2 for ; Mon, 7 Aug 2017 16:39:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA0A928686 for ; Mon, 7 Aug 2017 16:39:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9F1692868B; Mon, 7 Aug 2017 16:39:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7193528686 for ; Mon, 7 Aug 2017 16:39:22 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 2217D21DF37D1; Mon, 7 Aug 2017 09:37:06 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id B26AC21AEB0BA for ; Mon, 7 Aug 2017 09:37:04 -0700 (PDT) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga105.jf.intel.com with ESMTP; 07 Aug 2017 09:39:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos; i="5.41,339,1498546800"; d="scan'208"; a="1000989968" Received: from djiang5-desk3.ch.intel.com ([143.182.137.38]) by orsmga003.jf.intel.com with ESMTP; 07 Aug 2017 09:39:20 -0700 Subject: [PATCH v4 1/8] dmaengine: ioatdma: revert 7618d035 to allow sharing of DMA channels From: Dave Jiang To: vinod.koul@intel.com, dan.j.williams@intel.com Date: Mon, 07 Aug 2017 09:39:20 -0700 Message-ID: <150212396027.23722.3849314685091594927.stgit@djiang5-desk3.ch.intel.com> In-Reply-To: <150212381454.23722.1549806704988615279.stgit@djiang5-desk3.ch.intel.com> References: <150212381454.23722.1549806704988615279.stgit@djiang5-desk3.ch.intel.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dmaengine@vger.kernel.org, linux-nvdimm@lists.01.org Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Commit 7618d0359c16 ("dmaengine: ioatdma: Set non RAID channels to be private capable") makes all non-RAID ioatdma channels as private to be requestable by dma_request_channel(). With PQ CAP support going away for ioatdma, this would make all channels private. To support the usage of ioatdma for blk-mq implementation of pmem we need as many channels we can share in order to be high performing. Thus reverting the patch. Signed-off-by: Dave Jiang --- drivers/dma/ioat/init.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index ed8ed11..1b881fb 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -1153,9 +1153,6 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca) } } - if (!(ioat_dma->cap & (IOAT_CAP_XOR | IOAT_CAP_PQ))) - dma_cap_set(DMA_PRIVATE, dma->cap_mask); - err = ioat_probe(ioat_dma); if (err) return err;